模拟监测的涵洞为拱涵和盖板涵,共两种结构形式,均采用分离式基础。拱涵全长84.7m,涵洞拱厚0.55m,内部净高4.70m,宽4m,侧墙平均厚3.7m,基础高1m,涵洞顶部填土高度为12.08m。盖板涵全长97.03m,涵洞盖板厚0.45m,内部净高2.3m,宽2m,侧墙厚0.7m,基础高0.6m,涵洞顶部填土高度为12.14m。